Hi everyone, I need to upgrade my blackberry curve 9300 to 6.0.0.723. Can anyone on this forum help me??? 

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  1. Black Berry 9300 OS UPGRADE GUIDE

    (Optional) Uninstall any previous OS from PC.

    Download OS to PC. DOWNLOAD HERE Use Internet Explorer, not Firefox or Chrome. (For leaked versions, browser is irrelevant.)

    Following successful DL, run OS file to install OS on PC.

    On BB, go to BBM Options, scroll down to Backup section. Ensure Remote Backup is enabled AND also conduct a Local Backup to media card.

    Go through any 3rd party apps with option to save settings to media card. Conduct Backup to media card within each of these apps. (Examples: Bellshare apps like BerryBuzz & BerryWeather; QuickLaunch; Shao’s apps like Wallpaper Changer & SixTools; etc).

    Connect BB to PC. Open DM and backup device. Close DM.

    (Optional) Use desktop app like BBSAK or BBMCP to backup 3rd party apps.

    On PC, delete Vendor file located here:

    •64-bit: Computer/C:/Program Files (x86)/Common Files/Research In Motion/AppLoader

    •32-bit: Computer/C:/Program Files/Common Files/Research In Motion/AppLoader

    (Optional/Recommended) Run BB Boss v2.2 or BBH Tool (formerly Shrink-A-OS).

    In same AppLoader file where you deleted Vendor, double-click Loader to load OS to BB. Follow onscreen instructions.

    After loading OS, perform several physical battery pulls over first 1-2 days for OS to “settle in.” Perform first batt pull very soon after OS is loaded.

  2. Thank you very much for quick reply 🙂 am going to download OS and then will try to upgrade, will update here the results. Many thanks

  3. Don´t worry here is solution for your problem:

    How to Fix OS not Appearing as Available

    There are 2 common reasons:

    A. HIDDEN VENDOR FILE

    Consider trying this new desktop app to remove Vendor from several common locations:

    Vendor XML Remover V1.0

    If manually deleting Vendor, always hold down SHIFT and press DELETE to permanently delete.

    Check here first:

    64-bit: Computer\C:\Users\{USER NAME}\AppData\Roaming\Research In Motion\BlackBerry\Loader XML

    32-bit: Computer\C:\Documents and Settings\{USER NAME}\Application Data\Research In Motion\BlackBerry\Loader XML

    If Loader still doesn’t make new OS available, search PC for “Vendor”.

    If Vendor is not found anywhere, see below to delete contents of AppLoader folder. (Folder where you found Loader & Vendor.)

    B. APPLOADER FOLDER ITEMS

    Uninstall the OS: Control Panel\Programs and Features, highlight this BlackBerry Device Software, click Uninstall at top.

    Delete AppLoader folder contents: Highlight any item, CTRL+A to select all, SHIFT+DELETE to permanently delete.

    64-bit: Computer/C:/Program Files (x86)/Common Files/Research In Motion/AppLoader

    32-bit: Computer/C:/Program Files/Common Files/Research In Motion/AppLoader

    Restart PC

    Re-install OS on PC: Go to your browser’s downloads section, double-click OS to start InstallShield Wizard.

    Delete Vendor: Return to AppLoader folder, highlight Vendor, SHIFT+DELETE.

    Load OS to BB: Attach BB to PC, double-click Loader (in AppLoader folder, where you deleted Vendor).

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